This paper describes the design steps we have found to be necessary to create a practical design for realisation of a TINA-C like service environment supporting an advanced information service (Travel Agent). It was found to be important to start by constructing an enterprise model which delineated the roles of the stakeholders in the service. The next step was to construct a detailed service operation scenario within the enterprise model. Only after this work was complete was it possible to commence detailed system designs and make use of the technical content of the TINA-C deliverables. In particular it was found that management aspects could not be designed without a very clear idea of what was to be managed and why. A number of critical interfaces requiring standardisation have been identified during the work and the the nature of the standards needed is explored in some detail in the paper. The designs are now being implemented in an Asynchronous Transfer Mode (ATM) network enviro...